Home / 212,749.75-319,179.32-79,631.92

Finding the Fourth Proportional to 212,749.75, 319,179.32 and 79,631.92

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Solution

The fourth proportional to 212,749.75, 319,179.32 and 79,631.92 is: 119,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,749.75 : 319,179.32 = 79,631.92 : x
  2. Step 2: Convert to fraction form
    212,749.75/319,179.32 = 79,631.92/x
  3. Step 3: Cross multiply
    212,749.75x = 319,179.32 × 79,631.92
  4. Step 4: Simplify right side
    212,749.75x = 25,416,861,677.73
  5. Step 5: Solve for x
    x = 25,416,861,677.73/212,749.75
  6. Step 6: Final answer
    x = 119,468.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.